Explain the role of stromal cells in the hematopoietic microenvironment
What will be an ideal response?
Answer: Stromal cells express homing receptors for hematopoietic cells and produce components of the extracellular matrix (fibronectin, hemonectin, collagen, etc); they synthesize and secrete cytokines for growth, differentiation, and negative regulation; they produce membrane-bound cytokines for juxtacrine signaling (e.g., SCF, FL, SCI) to hematopoietic precursor cells.
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If premature delivery is anticipated, all of the following will help determine lung maturity, ex-cept:
a. the presence of oligohydramnios. b. lecithin-sphingomyelin (L:S) ratio. c. phosphatidylglycerol (PG) concentration. d. body mass index (BMI).
All of the following are ethnic minority groups in the U.S., EXCEPT
A) Asian B) Native American/Alaskan Native C) Caucasian D) Hispanic/Latina